Other WHMCS Modules

Telegam notification module for WHMCS
Pay Invoice Without login for WHMCS
Agree Terms Module for WHMCS
Email Validation module for WHMCS
Products Limiter modules for WHMCS
Trial on special days module for WHMCS
Password Change by admin module for WHMCS
Invite Code Module for WHMCS

Active or inactive EXISTING customers may send an invitation to their family or friends via email or copy/paste any way they please. That invite link would be unique and have a way for the admin to set the amount of time it would expire. That invite link would allow that person to view the rest of the website and create an order. It could only be used once. Also, the admin to create and send an invitation link as well.
In addition, if the invite link is used, meaning the person signs up for service, and also the ability to give a "commission" or "credit" I would define the amount to the person who sent the invite link.

Minimal Fields Pro

Hide or Show fields from register and cart area professionally.

Trial & Paid Mix Restriction

This module is appy restriction to checkout after add free trial and paid subscription in cart.
because if free trial and paid subscription add in cart and click on checkout then auto duel active. due to got credit down without profit.

Purchase Restriction Module for WHMCS

With this module guest client only can order as admin add limit not can add in cart more then limit. Logged in customers also can order as limit, if limit is 1 and logged in client already have one order ever product status is suspended, terminate or anything. then he cannot add more order.

Discount on payment gatways

With this module admin can give discount as gateway, such as on strip 20% discount, PayPal 10% discount or BTC payment 15% discount. admin able to set custom discount on all gateways even new orders or recurring or duel new and recurring.

Payment Gateway Fees Adjustment

AWC Gateway Fees Adjustment is allow to adminto adjustment fees of transection in invoice.

Force Terms acception during order whmcs module

This module help the admin to provide terms to client that accept it then place order. If not accept then client cannot be able to place order.

Quick Order whmcs module
Telegram Order Management module
Email Allowed for Register

Email Allowed for Register
you can only allow some mails like gmail.com,yahoo.com etc
so clients can only register with these email accounts cannot used any other mail for register you can allow and disable any time

One Page Checkout whmcs module

One Page Checkout whmcs module

Discord Linker whmcs module

AWC Discord Linker connects your WHMCS client area with your Discord community.
Clients can log in or register using their Discord account, link/unlink Discord from their WHMCS profile, and you can optionally lock the whole client area to “Discord only” access for maximum simplicity and security.